| LENGTH | 4.195 INCHES NOMINAL |
| MATERIAL | ALUMINUM OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) |
| SPECIAL FEATURES | CAST WITH 0.250 INCH BASE WITH 5 MOUNTING HOLES 0.188 THRU; STANDOFF SECTION HAS 4 FINS; CENTER HOLE IS THREADED FOR HELICAL COIL INSERT 0.250-2B (NASM21209F4-15) |
| THREAD SERIES DESIGNATOR | UNF LEFT INTERNAL (INCLUDES THRU THREAD) |
| THREAD QUANTITY PER INCH | 28 LEFT INTERNAL (INCLUDES THRU THREAD) |
| STYLE DESIGNATOR | INTERNALLY THREADED FULL LENGTH |
| SUPPLEMENTARY FEATURES | DRAWING CALLS THIS: STANDOFF, AFT GEARBOX |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| THREAD CLASS | 3B LEFT INTERNAL (INCLUDES THRU THREAD) |
| THREAD DIRECTION | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| THREAD LENGTH | 4.170 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) |